DM115 SiTi, DM115 Datasheet - Page 13

• Manufacturer Part Number: DM115
• Description: (DM114) 8-Bit Constant Current LED Drivers
• Manufacturer: SiTi

System Configuration Example
[1] Output current (I
[2] LED supply voltage (V
be used to reduce the Vout when the outputs consume current:
Note
noise induced by the input signals and the output sink current would not cause chip malfunction. To
prevent the drivers’ outputs from damage by overshoot stress, it is also advisable not to turn off the
drivers and scan transistors simultaneously.
8-BIT CONSTANT CURRENT LED DRIVERS with 3.3V~5V supply voltage
V
D D
Sink current is set by the external resistor as shown in figure (Iout vs. Rext).
To prevent too much power dissipated by the device due to higher V
This device has only one ground pin shared by signal, output sink current, and power ground.
It is advisable to pattern the ground layout with minimized inductance such that the switching
C P U
S C A N
V
SILICON TOUCH TECHNOLOGY INC.
LED
點晶科技股份有限公司
= V
OUT
CE
)
( T
LED
r
V
C L O C K
L A T C H
S E R IA L -IN
C L O C K
L A T C H
S E R IA L -IN
E N A B L E
E N A B L E
) setup
sat
) + V
R -E X T
R -E X T
R =
f
G N D
G N D
( LED forward voltage ) + V
Preliminary
V
I
O
LED
(max)
S E R IA L -O U T
S E R IA L -O U T
−
V
f
•
−
Bit
O U T 0
O U T 7
O U T 0
O U T 7
V
O
(max)
(min)
O
( IC supply voltage)
LED
Version:A.002
, an additional R can
DM114
V
L E D
R
= 3 ~ 4 (V )
、
DM115
Page 12